An abstract 2D Java game engine by William 'wilbefast' James Dyce. By default AWT (Abstract Window Toolkit) is used for input/output. AWT is not appropriate for most games, but since it comes with the JVM it means that project using it are a lot easier to distribute.
"Ambition" was originally written for LWJGL, but was ported to AWT to support ARM processors. Now the main branch uses AWT, with LWJGL as a side project. I've chosen to do this because some users may not need LWJGL, and so probably won't want wade through all the dependencies and native libraries to get it working!
If you need hardware accelerated graphics you can use the lwjgl-ambition fork of this project.